(0 8 6)(1 4 2)(3 13 5)(7 12 9)(10 16 14)(11 19 18)(15 20 17)
ALLOWS (11/8)-SEQUENCE
1: (1 4 7)

(0 8 6)(1 12 9 7 2)(3 13 5)(4)(10 16 14)(11 19 18)(15 20 17)
2: (3 13 5)

(0 8 6)(1 12 9 7 2)(3)(4)(5)(10 16 14)(11 19 18)(13)(15 20 17)
3: (0 8 6)

(0)(1 12 9 7 2)(3)(4)(5)(6)(8)(10 16 14)(11 19 18)(13)(15 20 17)
4: (2 9 7)

(0)(1 12 9)(2)(3)(4)(5)(6)(7)(8)(10 16 14)(11 19 18)(13)(15 20 17)